Insulator



Patented .lune

UNITED STATES PATENT FFICI.

WALTER T. eonnann, or vioTon, NEW Yoan, Assienoa, BY iaEsNn Assrsniann'rs, To Looxn INsULAToR CORPORATION, or BALTIMORE, MARYLAND, A conromi..

TION 0F MARYLAND. I

NSULATOB.

Application tiled December 8, 1917. Serial No. 206,208.

To all 'whom it may concern Be it known that I, .WAI/rea T. GODDARD,\

of Victor, in the county of Ontario and the State of New York, have invented certain new and useful Improvements in Insulators; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming` a part of this specicatio-n, and to the reference characters marked thereon.

My invention relates to insulators of the type that is supported upon an upstanding pin and comprises a series of insulating sections or units nested together, and it has for its purpose to improve the manufacture thereof and also materially `reduce the cost of production. Another object is to impart greater strength to the structure by building it along more uniform lines throughout and by distributing the pressure exerted by the sections upon each other in a direction which lends itself to a durable and practicable arrangement. To these and other ends the invention consists in certain improvements and combinations of parts, all as will be hereinafter more fully described, the novel features being pointed out in the claims at the end of the specification.

In the drawings:

Figure l is a vertical sectional View of an insulator constructed in accordance with my invention, and i Figure 2 is a bottom plan view.

Similar reference characters throughout the several views indicate the saine parts.

The novel features of my improvement are applicable to any insulator structure embodying a plurality of units or sections made of porcelain or similar insulating material, and supported one upon the other, and the present disclosure illustrates it as applied to a conventional form of insulator of the pin type and consisting of a series of skirted sections.

In the arrangement shown 1 designates the interior section or unit which is mounted upon a in or suitable support, 2 is the intermediatesection which is mounted upon the inner section 1 and 3 is the outermost section mounted upon the intermediate section 2. The sections 1, 2 and 8 are of very nearly uniform thickness throughout thus adding materially to their strength and lasting qualities, and they engage each other along conical surfaces, the effect of which is to produce a wedging action and consequent tighter engagement between the sections, and also to cause the weight or pressure of an upper section to be directed in part toward the centre of the insulatorand of the lower sect'on upon which it rests.

To this end, the sections l and 2 are each provi-ded with annular enlargements as indicated by 4. The portions 4 terminate on their upper sides in inclined or conical surfaces 5, the inclination of which is upwardly toward the centre of the insulator. The sections 2 and 3 have correspondingly inclined surfaces at the bottoms of their lower portions 6, and these engage the aforesaid conical surfaces 5. This arrangement causes a superposed section to readily centre itself properly on an under section and to engage the latter tightly. Moreover, the pressure or force exerted by a superposed section is at right angles to the conical surface on which it rests, and thus partially toward the centre of the insulator as a Whole.

The outer surfaces of the several units are so arranged that when in the final assembled relation, a substantially continuous and unbroken curved surface is afforded, while at the same time the several sections are of substantially uniform thickness throughout. By providing the enlargem-ents or flanged portions et to support a superposed section, it becomes unnecessary to cut away or weaken the sections at any part thereof. rIhe sections I, 2 and 3 are preferably held together in the usual manner by cement interposed in the spaces 7 afforded by the spaced vertical Walls of adjacent sections.

In addition 'to the advantage derived from having the thrust directed partially toward the centre of the insulator instead of in a direction parallel to its longitudinal axis, the present arrangement is considerably more practicable and economical from a manufacturing standpoint as it eliminates all sharp or angular corners or edges and makes it possible to mold the porcelain with rounded surfaces throughout. This eliminates a great amount of cracking of the porcelain which otherwise takes place and greatly reduces the number of sections that must be discarded on account of imperfec-- tions. The Structure is one that can be manufactured readily at comparatively low cost and is excellently adapted to withstanding abnormal strains, without being seriously affected.

I claim as my invention:

1. A pin type insulator comprising a plurality of. nested sections spaced from each other at their central portions both at the top and sides thereof, at least one of said sections having aplurality of spaced conical annular shoulders formed thereon, each of the adjacent sections having a conical shoulder adapted to contact one of the said first named shoulders, the surfaces of each of the said sections adjacent the cooperating shoulders thereon being an equal radial distance from the vertical axis of the insulator.

2. An insulator comprising a plurality of superimposed sections each adjacent pair of which has substantially conical cooperating annular bearing shoulders the adjacent surfaces of each pair being spaced apart at all points above the surface of contact of said shoulders, the said shoulders being adapted to center the superimposed sec` tion relative to the lower and effect between` 'them a wedging action the force of which is partially directed upon the sides of the lower section and through the center of the insulator, the cooperating shoulders on the two adjacent sections being upwardly inclined and having their outer edges at the same radial distance from the center of the insulator.

3. An insulator comprising at least a pair of cooperating sections, one of said sections being of approximately uniform thickness throughout having a conical central portion and provided with an annular enlargement at the base of said central portion, the upper side of which is inclined upwardly toward the centre of the section, affording a conical bearing for the cooperating section, whereby the pressure exert-ed by said cooperatingr section is partially toward the centre of the insulator the surface of said conical central portion being spaced from the adjacent a central conical portion and provided between its center and periphery with an an nular bearing surface the conical portion of eac-h nested section above said annular bearing surface having its surface at top and sides spaced from the surface of the adjacent section, said annular surface being adapted to cooperate with a similar surface on the adjacent section to center the sections relative to each other and effect a relative wedging action,'the said cooperating bearing surfaces terminating at the same radial distance from the axis of the insulator.

5. A. pin type insulator comprising a plurality of nested sections. an intermediate section provided with a pair of substantially parallel spaced upwardly inclined bearing shoulders, the adjacent sections each being furnished with a correspondingly formed shoulder, the last named shoulders each beingadapted to engage one of the first named shoulders on the said intermediate section, the exterior surfaces of the sections adjacent the cooperating shoulders extending in the same general direction without interruption, said sections being spaced from each other at all points above said cooperating shoulders.

6. A pin type insulator' comprising a plurality of nested insulating sections each of which is provided with a hollow central portion having a threadless conical exterior surface, and each of which is also provided with an annular bearing shoulder inclinin upwardly toward the center of the insu ator, the said inclined shoulder on at least one of said sections projecting outwardly beyond the base of the said conical central portion of the section upon which it is formed and being adapted to cooperate with the said inclined bearing shoulder on the adjacent insulating section, the adjacent conical surfaces of said sections being spaced apart at all points above the surface of contact of said shoulders.

WALTER T. GODDARD. 

